import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class Demo30 {

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Callable<Integer> callable = new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                int num = 0;
                for (int i = 0; i < 5000; i++) {
                    num++;
                }

                return num;
            }
        };

        FutureTask<Integer> task = new FutureTask<>(callable);
        Thread t = new Thread(task);
        t.start();
        System.out.println(task.get());
    }
}
